# SDR USAASB02234

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 26, 2002
- Submitted: January 17, 2003
- Operation: Air carrier
- Aircraft: N426US
- Make and model: Boeing 737-4B7
- Registry model: [Boeing 737-4B7](https://openairdocs.org/model/boeing-737-4b7) (OpenAirDocs)
- Aircraft serial: 24548
- System (JASC): [2424 · AC Regulator](https://openairdocs.org/jasc/2424)
- Part: Gcu
- Part number: 948F4581
- Condition: Failed
- Location: Nr 2
- Part time: 41,456 hours, 11,523 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAASB02234

## Discrepancy

PHL - MAINTENANCE REPORTED AN ELECTRICAL ODOR AND SMOKE IN THE COCKPIT WHILE TAXIING AIRCRAFT TO THE GATE.  MAINTENANCE TROUBLESHOT THE PROBLEM TO THE NR 2 GENERATOR CONTROL UNIT (GCU). REMOVED AND REPLACED THE NR 2 GCU.  RAN ENGINES.  ALL SYSTEMS CHECK GOOD.  NO ELECTRICAL ODOR OR SMOKE NOTED.  (M)

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